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// file : libbuild2/name.cxx -*- C++ -*-
// license : MIT; see accompanying LICENSE file
#include <libbuild2/types.hxx> // Note: not <libbuild2/name.hxx>
#include <string.h> // strchr()
#include <libbuild2/diagnostics.hxx>
namespace build2
{
const name empty_name;
const names empty_names;
void name::
canonicalize ()
{
// We cannot assume the name part is a valid filesystem name so we will
// have to do the splitting manually.
//
size_t p (path_traits::rfind_separator (value));
if (p != string::npos)
{
if (p + 1 == value.size ())
throw invalid_argument ("empty value");
dir /= dir_path (value, p != 0 ? p : 1); // Special case: "/".
value.erase (0, p + 1);
}
}
string
to_string (const name& n)
{
string r;
// Note: similar to to_stream() below.
//
if (n.empty ())
return r;
if (n.proj)
{
r += n.proj->string ();
r += '%';
}
// If the value is empty, then we want to put the last component of the
// directory inside {}, e.g., dir{bar/}, not bar/dir{}.
//
bool v (!n.value.empty ());
bool t (!n.type.empty ());
const dir_path& pd (v ? n.dir :
t ? n.dir.directory () :
dir_path ());
if (!pd.empty ())
r += pd.representation ();
if (t)
{
r += n.type;
r += '{';
}
if (v)
r += n.value;
else
r += (pd.empty () ? n.dir : n.dir.leaf ()).representation ();
if (t)
r += '}';
return r;
}
ostream&
to_stream (ostream& os, const name& n, bool quote, char pair, bool escape)
{
auto write_string = [quote, pair, escape, &os](const string& v, bool pat)
{
char sc[] = {
'{', '}', '[', ']', '$', '(', ')', // Token endings.
' ', '\t', '\n', '#', // Spaces.
'\\', '"', // Escaping and quoting.
'%', // Project name separator.
pair, // Pair separator, if any.
'\0'};
char pc[] = {
'*', '?', // Wildcard characters.
'\0'};
if (quote && v.find ('\'') != string::npos)
{
// Quote the string with the double quotes rather than with the single
// one. Escape some of the special characters.
//
if (escape) os << '\\';
os << '"';
for (auto c: v)
{
if (strchr ("\\$(\"", c) != nullptr) // Special inside double quotes.
os << '\\';
os << c;
}
if (escape) os << '\\';
os << '"';
}
else if (quote && (v.find_first_of (sc) != string::npos ||
(!pat && v.find_first_of (pc) != string::npos)))
{
if (escape) os << '\\';
os << '\'';
os << v;
if (escape) os << '\\';
os << '\'';
}
else
os << v;
};
uint16_t dv (stream_verb (os).path); // Directory verbosity.
auto write_dir = [dv, quote, &os, &write_string] (const dir_path& d,
bool pat)
{
if (quote)
write_string (dv < 1 ? diag_relative (d) : d.representation (), pat);
else
os << d;
};
// Note: similar to to_string() above.
//
// If quoted then print empty name as '' rather than {}.
//
if (quote && n.empty ())
return os << (escape ? "\\'\\'" : "''");
if (n.proj)
{
write_string (n.proj->string (), false);
os << '%';
}
// If the value is empty, then we want to print the last component of the
// directory inside {}, e.g., dir{bar/}, not bar/dir{}. We also want to
// print {} for an empty name (unless quoted, which is handled above).
//
bool d (!n.dir.empty ());
bool v (!n.value.empty ());
bool t (!n.type.empty ());
// Note: relative() may return empty.
//
const dir_path& rd (dv < 1 ? relative (n.dir) : n.dir); // Relative.
const dir_path& pd (v ? rd :
t ? rd.directory () :
dir_path ());
if (!pd.empty ())
write_dir (pd, false);
if (t || (!d && !v))
{
if (t)
write_string (n.type, false);
os << '{';
}
if (v)
write_string (n.value, n.pattern);
else if (d)
{
if (rd.empty ())
write_string (dir_path (".").representation (), false);
else if (!pd.empty ())
write_string (rd.leaf ().representation (), n.pattern);
else
write_dir (rd, n.pattern);
}
if (t || (!d && !v))
os << '}';
return os;
}
ostream&
to_stream (ostream& os,
const names_view& ns,
bool quote,
char pair,
bool escape)
{
for (auto i (ns.begin ()), e (ns.end ()); i != e; )
{
const name& n (*i);
++i;
to_stream (os, n, quote, pair, escape);
if (n.pair)
os << n.pair;
else if (i != e)
os << ' ';
}
return os;
}
}
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